🧱 HomeRacker Core

📌 What

The core building system for HomeRacker — the fully modular 3D-printable rack-building platform. Provides supports, connectors, and lock pins as parametric OpenSCAD modules.

🤔 Why

Modularity: Snap-together system using standardized 15mm units — no glue, no screws
Parametric: Every component is fully customizable via OpenSCAD Customizer
Extensible: Library modules (lib/) can be included in your own projects

See the main README’s Tech Specs for dimensional rationale and assembly basics.

🔧 How

Using the Library

Include the core library in your OpenSCAD projects:

use <core/main.scad>

// Create a 3-directional connector
connector(dimensions=3, directions=3);

// Create a support beam (3 units long)
support(units=3);

// Create a lock pin with standard grip
lockpin(grip_type="standard");

Customizing Parts

Open any file in parts/ with OpenSCAD and use the Customizer panel to adjust parameters:

connector.scad: Customize dimensions, directions, pull-through axes, and orientation
support.scad: Customize length and hole configurations
lockpin.scad: Customize grip type (standard, extended or no-grip)

Exporting Variants

The presets/ folder contains modules for batch-exporting all logical variants:

connectors.scad: Organized collections (standard, pull-through)
supports.scad: Various support lengths with different hole configurations
lockpins.scad: Standard grip, extended and no-grip variants

🧩 Core Components

1. Supports (Beams)

Structural elements with standardized connection points.

15mm × 15mm cross-section
Configurable length (multiples of 15mm)
Optional X-axis holes for cable management

2. Connectors

Junction pieces that join supports in multiple directions.

1D, 2D, or 3D variants (up to 6 directions)
Optional pull-through axes for complex builds
Lock pin holes (4mm square pins)
Use foot inserts to create a stable contact interface to the ground

3. Lock Pins

4mm square pins that secure connectors to supports via tension fit.

Standard grip: Two grip arms for easy insertion/removal
Extended grip: Two asymmetric grip arms with a dominant outer arm.
No-grip variant: Smooth design for minimal profile
Bidirectional tension hole for secure fit

📐 Dimensional Standards

Base Unit: 15mm
Lock Pin: 4mm square
Wall Thickness: 2mm
Tolerance: 0.2mm (built into connectors)
Standard Chamfer: 1mm
Lock Pin Chamfer: 0.8mm

📸 Catalog

Part	Preview
Connector
Support
Lock Pin

To generate or refresh previews:

./cmd/export/export-png.sh models/core/parts/<part>.scad

📝 License

Source Code: MIT License
3D Models: CC BY-SA 4.0

HomeRacker

A printable modular rack building system